1 /* libunwind - a platform-independent unwind library 2 Copyright (C) 2003 Hewlett-Packard Co 3 Contributed by David Mosberger-Tang <davidm (at) hpl.hp.com> 4 Copyright (C) 2010 Konstantin Belousov <kib (at) freebsd.org> 5 6 This file is part of libunwind. 7 8 Permission is hereby granted, free of charge, to any person obtaining 9 a copy of this software and associated documentation files (the 10 "Software"), to deal in the Software without restriction, including 11 without limitation the rights to use, copy, modify, merge, publish, 12 distribute, sublicense, and/or sell copies of the Software, and to 13 permit persons to whom the Software is furnished to do so, subject to 14 the following conditions: 15 16 The above copyright notice and this permission notice shall be 17 included in all copies or substantial portions of the Software. 18 19 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 20 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 21 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 22 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 23 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 24 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 25 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ 26 27 #include "_UPT_internal.h" 28 29 #if HAVE_DECL_PTRACE_POKEUSER || HAVE_TTRACE 30 int 31 _UPT_access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val, 32 int write, void *arg) 33 { 34 unw_word_t *wp = (unw_word_t *) val; 35 struct UPT_info *ui = arg; 36 pid_t pid = ui->pid; 37 int i; 38 39 if ((unsigned) reg >= ARRAY_SIZE (_UPT_reg_offset)) 40 return -UNW_EBADREG; 41 42 errno = 0; 43 if (write) 44 for (i = 0; i < (int) (sizeof (*val) / sizeof (wp[i])); ++i) 45 { 46 #ifdef HAVE_TTRACE 47 # warning No support for ttrace() yet. 48 #else 49 /* ANDROID support update. */ 50 ptrace (PTRACE_POKEUSER, pid, (void*) (_UPT_reg_offset[reg] + i * sizeof(wp[i])), 51 (void*) wp[i]); 52 /* End of ANDROID update. */ 53 #endif 54 if (errno) 55 return -UNW_EBADREG; 56 } 57 else 58 for (i = 0; i < (int) (sizeof (*val) / sizeof (wp[i])); ++i) 59 { 60 #ifdef HAVE_TTRACE 61 # warning No support for ttrace() yet. 62 #else 63 /* ANDROID support update. */ 64 wp[i] = ptrace (PTRACE_PEEKUSER, pid, 65 (void*) (_UPT_reg_offset[reg] + i * sizeof(wp[i])), 0); 66 /* End of ANDROID update. */ 67 #endif 68 if (errno) 69 return -UNW_EBADREG; 70 } 71 return 0; 72 } 73 #elif HAVE_DECL_PT_GETFPREGS 74 int 75 _UPT_access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val, 76 int write, void *arg) 77 { 78 struct UPT_info *ui = arg; 79 pid_t pid = ui->pid; 80 fpregset_t fpreg; 81 82 if ((unsigned) reg >= ARRAY_SIZE (_UPT_reg_offset)) 83 return -UNW_EBADREG; 84 85 if (ptrace(PT_GETFPREGS, pid, (caddr_t)&fpreg, 0) == -1) 86 return -UNW_EBADREG; 87 if (write) { 88 #if defined(__amd64__) 89 memcpy(&fpreg.fpr_xacc[reg], val, sizeof(unw_fpreg_t)); 90 #elif defined(__i386__) 91 memcpy(&fpreg.fpr_acc[reg], val, sizeof(unw_fpreg_t)); 92 #else 93 #error Fix me 94 #endif 95 if (ptrace(PT_SETFPREGS, pid, (caddr_t)&fpreg, 0) == -1) 96 return -UNW_EBADREG; 97 } else 98 #if defined(__amd64__) 99 memcpy(val, &fpreg.fpr_xacc[reg], sizeof(unw_fpreg_t)); 100 #elif defined(__i386__) 101 memcpy(val, &fpreg.fpr_acc[reg], sizeof(unw_fpreg_t)); 102 #else 103 #error Fix me 104 #endif 105 return 0; 106 } 107 /* ANDROID support update. */ 108 #elif defined(__mips__) || defined(__aarch64__) 109 int 110 _UPT_access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val, 111 int write, void *arg) 112 { 113 # pragma message("_UPT_access_fpreg is not implemented and not currently used.") 114 return -UNW_EBADREG; 115 } 116 /* End of ANDROID update. */ 117 #else 118 #error Fix me 119 #endif 120
